/* ============================================================
   TORRENTIA 2026 — styles.css
   Premium landing page stylesheet
   Fonts: Cormorant Garamond (display) + DM Sans (body)
   ============================================================ */

/* ---- CSS CUSTOM PROPERTIES --------------------------------- */
:root {
  /* Colors */
  --c-bg:          #0c0d0e;
  --c-bg-2:        #111315;
  --c-bg-3:        #161a1d;
  --c-surface:     rgba(255,255,255,0.04);
  --c-border:      rgba(255,255,255,0.08);
  --c-border-hi:   rgba(255,255,255,0.15);

  --c-text:        #f0ede8;
  --c-text-2:      #a09b93;
  --c-text-3:      #6b6560;

  --c-accent:      #c8a96e;    /* warm gold — primary site accent */
  --c-accent-2:    #9e7f4a;    /* darker gold */
  --c-accent-glow: rgba(200,169,110,0.18);

  --c-whatsapp:    #25d366;
  --c-whatsapp-dk: #1da851;
  --c-whatsapp-glow: rgba(37,211,102,0.25);

  /* Typography */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  8rem;

  /* Layout */
  --max-w: 1200px;
  --nav-h: 72px;

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast:   150ms;
  --t-mid:    350ms;
  --t-slow:   650ms;
}

/* ---- RESET & BASE ------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; background: none; border: none; font: inherit; }

/* ---- CANVAS (particles) ------------------------------------ */
#particles-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

/* ---- LAYOUT: container ------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}

/* ---- TYPOGRAPHY PRIMITIVES --------------------------------- */
.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 600;
  line-height: 1.12;
  color: var(--c-text);
  margin-bottom: 1.75rem;
}

.section-title em {
  font-style: italic;
  font-weight: 300;
  color: var(--c-accent);
}

.body-text {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--c-text-2);
  line-height: 1.8;
  margin-bottom: 1.25rem;
  max-width: 58ch;
}

/* ---- BUTTONS --------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 3px;
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform var(--t-mid) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out),
              background var(--t-fast) var(--ease);
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease);
}

.btn:hover::after { opacity: 0.07; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

/* Sizes */
.btn--sm  { padding: 0.5rem 1.1rem;   font-size: 0.8rem; }
.btn--md  { padding: 0.75rem 1.5rem;  font-size: 0.9rem; }
.btn--lg  { padding: 0.9rem 2rem;     font-size: 0.95rem; }
.btn--xl  { padding: 1.1rem 2.6rem;   font-size: 1rem; }

/* WhatsApp */
.btn--whatsapp {
  background: var(--c-whatsapp);
  color: #0a2e1a;
  font-weight: 600;
  box-shadow: 0 0 0 0 var(--c-whatsapp-glow);
}
.btn--whatsapp:hover {
  background: #2de070;
  box-shadow: 0 8px 30px var(--c-whatsapp-glow);
}
.btn--whatsapp i { font-size: 1.1em; }

/* Primary */
.btn--primary {
  background: var(--c-accent);
  color: var(--c-bg);
  font-weight: 600;
  box-shadow: 0 0 0 0 var(--c-accent-glow);
}
.btn--primary:hover {
  background: #d4b67e;
  box-shadow: 0 8px 30px var(--c-accent-glow);
}

/* Ghost */
.btn--ghost {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border-hi);
}
.btn--ghost:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* ---- NAVIGATION -------------------------------------------- */
.nav-wrapper {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease),
              backdrop-filter var(--t-mid) var(--ease);
}

.nav-wrapper.scrolled {
  background: rgba(12, 13, 14, 0.72);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  box-shadow: 0 1px 0 var(--c-border);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.nav-logo__img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  /* Graceful fallback if image is missing */
  background: var(--c-bg-3);
  border-radius: 50%;
}

.nav-logo__text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--c-text-2);
  padding: 0.5rem 0.75rem;
  border-radius: 3px;
  transition: color var(--t-fast) var(--ease);
}
.nav-link:hover { color: var(--c-text); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--t-mid) var(--ease),
              opacity var(--t-fast) var(--ease);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ---- HERO -------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-color: var(--c-bg-2); /* fallback */
  transform: scale(1.04);
  transition: transform 10s linear;
  will-change: transform;
}

.hero.in-view .hero__bg { transform: scale(1); }

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(12,13,14,0.85) 0%,
    rgba(12,13,14,0.65) 40%,
    rgba(12,13,14,0.85) 100%
  );
}

/* subtle animated gradient glow */
.hero__overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 60%, rgba(200,169,110,0.07), transparent 70%);
  animation: hero-glow 8s ease-in-out infinite alternate;
}

@keyframes hero-glow {
  from { opacity: 0.5; transform: scale(0.95); }
  to   { opacity: 1;   transform: scale(1.05); }
}

.hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  padding-block: var(--space-xl);
}

.hero__eyebrow {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 1.5rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 9.5rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.02em;
  margin-bottom: 0.35em;
}

.hero__title-main { display: block; }

.hero__title-year {
  display: block;
  font-weight: 300;
  font-style: italic;
  font-size: 0.55em;
  color: var(--c-accent);
  letter-spacing: 0.04em;
}

.hero__tagline {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 2.1rem);
  font-weight: 300;
  font-style: italic;
  color: var(--c-text-2);
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}

.hero__sub {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--c-text-2);
  line-height: 1.75;
  max-width: 52ch;
  margin-bottom: 2.5rem;
}

.break-desktop { display: none; }
@media (min-width: 768px) { .break-desktop { display: block; } }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

/* Countdown */
.hero__countdown {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  padding: 0.6rem 1rem;
  min-width: 64px;
  backdrop-filter: blur(10px);
}

.countdown-num {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 600;
  line-height: 1;
  color: var(--c-accent);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.countdown-label {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-text-3);
  margin-top: 0.25rem;
}

.countdown-sep {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--c-text-3);
  padding-inline: 0.1rem;
  margin-bottom: 1rem;
}

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--c-text-3);
  font-size: 1.3rem;
  animation: bob 2.5s ease-in-out infinite;
  transition: color var(--t-fast) var(--ease);
}
.hero__scroll-hint:hover { color: var(--c-accent); }

@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ---- SECTION DIVIDER --------------------------------------- */
.section-divider {
  display: flex;
  justify-content: center;
  padding-block: 0;
}

.divider-line {
  display: block;
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--c-border-hi) 35%,
    var(--c-accent) 50%,
    var(--c-border-hi) 65%,
    transparent 100%
  );
  opacity: 0.4;
  transform: scaleX(0);
  transition: transform 1.2s var(--ease-out);
}
.divider-line.visible { transform: scaleX(1); }

/* ---- ABOUT ------------------------------------------------- */
.about {
  padding-block: var(--space-xl);
  position: relative;
  z-index: 1;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.about__stats {
  display: flex;
  gap: 2rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--c-border);
  margin-top: 0.5rem;
}

.stat-item { display: flex; flex-direction: column; gap: 0.2rem; }

.stat-num {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 600;
  color: var(--c-accent);
  line-height: 1;
}

.stat-desc {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-3);
}

.about__img-frame {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 4/5;
  border: 1px solid var(--c-border);
}

.about__img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--c-bg-3);
  transition: transform var(--t-slow) var(--ease);
}

.about__img-frame:hover img { transform: scale(1.03); }

.about__img-label {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background: rgba(12,13,14,0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--c-border);
  border-radius: 3px;
  padding: 0.4rem 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--c-text-2);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ---- EVENT DETAILS ----------------------------------------- */
.event {
  padding-block: var(--space-xl);
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, transparent, var(--c-bg-2) 10%, var(--c-bg-2) 90%, transparent);
}

.event__cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5px;
  margin-top: var(--space-lg);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  overflow: hidden;
}

.event-card {
  background: var(--c-surface);
  padding: 2.5rem 2rem;
  border-right: 1px solid var(--c-border);
  transition: background var(--t-mid) var(--ease);
  position: relative;
  overflow: hidden;
}

.event-card:last-child { border-right: none; }

.event-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-mid) var(--ease-out);
}

.event-card:hover { background: rgba(255,255,255,0.06); }
.event-card:hover::before { transform: scaleX(1); }

.event-card__icon {
  font-size: 1.8rem;
  color: var(--c-accent);
  margin-bottom: 1.25rem;
}

.event-card__title {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-text-3);
  margin-bottom: 0.5rem;
}

.event-card__value {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.2;
  margin-bottom: 0.4rem;
}

.event-card__note {
  font-size: 0.8rem;
  color: var(--c-text-3);
}

/* ---- WHY ATTEND -------------------------------------------- */
.why {
  padding-block: var(--space-xl);
  position: relative;
  z-index: 1;
}

.why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5px;
  margin-top: var(--space-lg);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  overflow: hidden;
}

.why-card {
  background: var(--c-surface);
  padding: 2.25rem 1.75rem;
  border-right: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--t-mid) var(--ease),
              transform var(--t-mid) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.why-card:nth-child(3n) { border-right: none; }
.why-card:nth-last-child(-n+3) { border-bottom: none; }

.why-card:hover { background: rgba(255,255,255,0.05); }

.why-card__icon {
  font-size: 1.6rem;
  color: var(--c-accent);
  margin-bottom: 1rem;
  transition: transform var(--t-mid) var(--ease-out);
}
.why-card:hover .why-card__icon { transform: scale(1.15) rotate(-5deg); }

.why-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 0.6rem;
  line-height: 1.25;
}

.why-card__text {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--c-text-2);
  line-height: 1.7;
}

/* ---- SPEAKERS ---------------------------------------------- */
.speakers {
  padding-block: var(--space-xl);
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, transparent, var(--c-bg-2) 10%, var(--c-bg-2) 90%, transparent);
}

.speakers__sub {
  font-size: 1rem;
  color: var(--c-text-2);
  max-width: 55ch;
  margin-bottom: var(--space-lg);
}

.speakers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.speaker-card {
  position: relative;
  cursor: default;
}

.speaker-card__img-wrap {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.85rem;
  border: 1px solid var(--c-border);
  background: var(--c-bg-3);
}

.speaker-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.5) brightness(0.6);
  transition: filter var(--t-mid) var(--ease), transform var(--t-slow) var(--ease);
}

.speaker-card:hover .speaker-card__img-wrap img {
  filter: grayscale(0) brightness(0.8);
  transform: scale(1.04);
}

.speaker-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(12,13,14,0.5);
  font-size: 2.5rem;
  color: var(--c-accent);
  opacity: 0.8;
}

.speaker-card__name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 0.2rem;
}

.speaker-card__role {
  font-size: 0.75rem;
  color: var(--c-text-3);
  letter-spacing: 0.08em;
}

.speakers__updates {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--c-text-3);
  padding: 1rem 1.25rem;
  border: 1px solid var(--c-border);
  border-radius: 4px;
  background: var(--c-surface);
}

.speakers__updates i { color: var(--c-accent); font-size: 1.1rem; }

/* ---- COMMUNITY -------------------------------------------- */
.community {
  padding-block: var(--space-xl);
  position: relative;
  z-index: 1;
}

.community__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.community__img-frame {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 4/3;
  border: 1px solid var(--c-border);
}

.community__img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--c-bg-3);
  transition: transform var(--t-slow) var(--ease);
}

.community__img-frame:hover img { transform: scale(1.03); }

/* ---- REGISTER BAND ---------------------------------------- */
.register-band {
  padding-block: var(--space-xl);
  position: relative;
  z-index: 1;
  text-align: center;
  overflow: hidden;
}

.register-band__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 70% at 50% 50%, rgba(200,169,110,0.07), transparent 70%),
    linear-gradient(180deg, transparent, var(--c-bg-3), transparent);
  pointer-events: none;
}

.register-band__inner {
  position: relative;
  z-index: 2;
}

.register-band__eyebrow {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 1rem;
}

.register-band__title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 600;
  line-height: 1.05;
  color: var(--c-text);
  margin-bottom: 1.25rem;
}

.register-band__sub {
  font-size: 1rem;
  color: var(--c-text-2);
  max-width: 50ch;
  margin-inline: auto;
  margin-bottom: 2.5rem;
}

.register-band__note {
  margin-top: 1.25rem;
  font-size: 0.8rem;
  color: var(--c-text-3);
  letter-spacing: 0.06em;
}

/* ---- FOOTER ----------------------------------------------- */
.footer {
  border-top: 1px solid var(--c-border);
  padding-top: var(--space-lg);
  padding-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 2rem;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--c-border);
}

.footer__brand { display: flex; flex-direction: column; gap: 0.5rem; }

.footer__brand-tagline {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-style: italic;
  color: var(--c-text-3);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  text-align: center;
}

.footer__link {
  font-size: 0.8rem;
  color: var(--c-text-3);
  letter-spacing: 0.06em;
  transition: color var(--t-fast) var(--ease);
}
.footer__link:hover { color: var(--c-accent); }

.footer__social {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  align-items: center;
}

.footer__social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  font-size: 1rem;
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              transform var(--t-mid) var(--ease-out);
}
.footer__social-link:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
  transform: translateY(-2px);
}

.footer__bottom {
  padding-top: var(--space-md);
  font-size: 0.75rem;
  color: var(--c-text-3);
  text-align: center;
  letter-spacing: 0.04em;
}

/* ---- SCROLL REVEAL ANIMATIONS ------------------------------ */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero items use data-delay for stagger */
[data-delay="0"] { transition-delay: 0ms; }
[data-delay="1"] { transition-delay: 120ms; }
[data-delay="2"] { transition-delay: 240ms; }
[data-delay="3"] { transition-delay: 360ms; }
[data-delay="4"] { transition-delay: 480ms; }
[data-delay="5"] { transition-delay: 620ms; }

/* ---- RESPONSIVE: TABLET ------------------------------------ */
@media (max-width: 1024px) {
  .event__cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .event-card:nth-child(2) { border-right: none; }
  .event-card:nth-child(3) { border-right: 1px solid var(--c-border); }
  .event-card { border-bottom: 1px solid var(--c-border); }
  .event-card:nth-child(3),
  .event-card:nth-child(4) { border-bottom: none; }

  .why__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .why-card:nth-child(2n) { border-right: none; }
  .why-card:nth-child(3) { border-right: 1px solid var(--c-border); }
  .why-card:nth-last-child(-n+2) { border-bottom: none; }
  .why-card:nth-child(5) { border-bottom: 1px solid var(--c-border); }

  .speakers__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .about__grid,
  .community__grid {
    grid-template-columns: 1fr;
  }
  .about__visual { order: -1; }
  .about__img-frame { aspect-ratio: 16/9; }
  .community__img-frame { aspect-ratio: 16/9; }
}

/* ---- RESPONSIVE: MOBILE ------------------------------------ */
@media (max-width: 640px) {
  :root {
    --space-xl: 5rem;
    --space-lg: 2.5rem;
  }

  /* Nav mobile */
  .nav-hamburger {
    display: flex;
    z-index: 10;
  }

  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: min(300px, 80vw);
    height: 100svh;
    background: rgba(12,13,14,0.97);
    backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    padding: var(--nav-h) 2rem 2rem;
    transform: translateX(110%);
    transition: transform var(--t-mid) var(--ease-out);
    border-left: 1px solid var(--c-border);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-link {
    padding: 1rem 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--c-border);
    letter-spacing: 0.1em;
  }

  .nav-links .btn {
    margin-top: 1.5rem;
    width: 100%;
    justify-content: center;
  }

  /* Hero */
  .hero__title {
    font-size: clamp(3.5rem, 16vw, 5rem);
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }
  .hero__actions .btn { width: 100%; justify-content: center; }

  .hero__countdown {
    gap: 0.15rem;
  }
  .countdown-unit {
    min-width: 52px;
    padding: 0.5rem 0.6rem;
  }
  .countdown-num { font-size: 1.4rem; }

  /* Event cards */
  .event__cards {
    grid-template-columns: 1fr;
  }
  .event-card { border-right: none; border-bottom: 1px solid var(--c-border); }
  .event-card:last-child { border-bottom: none; }

  /* Why */
  .why__grid {
    grid-template-columns: 1fr;
  }
  .why-card { border-right: none; }

  /* Speakers */
  .speakers__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Footer */
  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer__brand { align-items: center; }
  .footer__links { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .footer__social { justify-content: center; }
}

/* ---- REDUCED MOTION ACCESSIBILITY -------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .fade-up, .reveal {
    opacity: 1;
    transform: none;
  }
}